Enhanced antimicrobics of peroxidase-like Cu2O/NPC from Cu-MOF presented in palygorskite
The misuse of antibiotics leads to the emergence of a variety of drug-resistant bacteria, which poses a serious threat to human life. Novel antimicrobial strategies are urgently needed. Herein, peroxidase-like enzyme material of Cu 2 O/NPC/Pal was prepared from Cu 2 O/nanoporous carbon (Cu 2 O/NPC) derived from Cu-MOF in the presence of palygorskite (Pal) by the pyrolysis-etching-pyrolysis strategy. Cu 2 O/NPC/Pal could catalyze the production of ·O 2 − from H 2 O 2 to cause the oxidative stress and cell membrane damage to bacteria. The antibacterial rates against Staphylococcus aureus and Pseudomonas aeruginosa reached 98.99 % and 92.70 %, respectively. In addition, Cu 2 O/NPC/Pal can promote the oxidation of glutathione and the consumption of intracellular effectively. Introduction of Pal into Cu 2 O/NPC significantly enhances the binding affinity and forms a highly concentrated substrate microenvironment. The study provided the pyrolysis strategy for the synthesis of carbon-based metal oxide nanomaterials in combination with mineral-based materials for the enhancement of peroxide-like activity in antimicrobial application.
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